To answer this question, we need to understand the story of Jayadratha and the Chakravyuha. Jayadratha was a Kaurava prince who played a significant role in the Mahabharata war. During the battle, the Kauravas formed a military formation called the Chakravyuha, which was impenetrable from the outside. Abhimanyu, the son of Arjuna, possessed the knowledge of how to enter the Chakravyuha but not how to exit it.
On the day of the Chakravyuha, Jayadratha managed to hold back the Pandavas (except Arjuna) and prevent them from following Abhimanyu inside. This ultimately led to Abhimanyu's death.
The reason behind Jayadratha's ability to hold back the Pandavas was a boon bestowed upon him by Lord Shiva. The boon granted Jayadratha the power to singlehandedly hold back all the Pandavas (except Arjuna) for one day.
Therefore, the correct answer is:
D. Shiva - This option is correct because Jayadratha's ability to hold back the Pandavas was a result of a boon granted to him by Lord Shiva.